lima peru ap officials say foot bridge peru highlands collapsed sending dozens children teachers nearby school plunging 230 feet 70 meters ravine killing people authorities ayacucho province say nearly 80 people crossing bridge wood planks strung steel cables gave way monday fell dry riverbed cora cora region 485 kilometers 300 miles southeast lima teachers schoolchildren died ayacucho health director maria torrealba told canal n television 70 people hurt 33 head injuries ayacucho gov ernesto molina says rescuers working evacuate 30 children ravine copyright 2009 associated press rights reserved material published broadcast rewritten redistributed